sql之left join、right join、inner join的区别 - 网络营销电子商务研究中心

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sql之left join、right join、inner join的区别

#3 IP: 112.87.17.117

2015-05-21, 07:04 AM

West University Place West University Place is offline

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Join Date: 2008-07-31

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用上面提到的A、B表为例：
select * from A
left join
(
select bID,bName from B where bID <= 3
)T
on T.bID = A.aID

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